| Type: | WMC |
| Grand Prix: | San Sebastián |
| Date: | 18 July |
| Year: | 1926 |
| Official Name: | IV Gran Premio de San Sebastián IV Grand Prix d'Europe |
| Country: | Spain |
| Flag Suffix: | 1785 |
| Race No: | 3 |
| Season No: | 5 |
| Location: | San Sebastián, Spain |
| Course: | Circuito Lasarte |
| Course Mi: | 11.76 |
| Course Km: | 17.32 |
| Distance Laps: | 45 |
| Distance Mi: | 484.2 |
| Distance Km: | 799.2 |
| Pole Driver: | Bartolomeo Costantini[1] |
| Pole Country: | Italy |
| Pole Flag Suffix: | 1861 |
| Pole Team: | Bugatti |
| Grid From Number: | True |
| Fast Driver: | Louis Wagner |
| Fast Team: | Delage |
| Fast Time: | 7:54.6 |
| Fast Country: | France |
| First Driver: | Jules Goux |
| First Team: | Bugatti |
| First Country: | France |
| Second Driver: | Edmond Bourlier |
| Second Team: | Delage |
| Second Country: | France |
| Second Driver2: | Robert Sénéchal |
| Second Country2: | France |
| Third Driver: | Meo Costantini |
| Third Team: | Bugatti |
| Third Country: | Italy |
| Third Flag Suffix: | 1861 |
The 1926 San Sebastián Grand Prix was a Grand Prix motor race held at Circuito Lasarte on 18 July 1926. It was also designated as the European Grand Prix.
It was the third race of the 1926 AIACR World Manufacturers' Championship season. The Delage 15 S 8 made its racing debut here but proved to be quite challenging to drive. The exhaust pipes of the Delage's passed beneath the floor where the drivers' feet were, causing them to gradually burn. The drivers had to take turns in the cars, in order to avoid serious injury.[2]
As Robert Sénéchal was not listed as an official Delage reserve driver, after the race both cars he drove were disqualified, as well as the Bugatti driven by unofficial reserve driver Louis Dutilleux. However after an appeal to the AIACR Court of Appeals, these results were all reinstated as the officials had approved the driver changes during the race.
| Pos | No | Driver | Car | Laps | Time/Retired | |
|---|---|---|---|---|---|---|
| 1 | 10 |  Jules Goux | Bugatti T39A | 45 | 6h51m52 | |
| 2 | 15 | Edmond Bourlier Robert Sénéchal | Delage 15 S 8 | 45 | 6h59m42 | |
| 3 | 2 |  Meo Costantini | Bugatti T39A | 45 | 7h28m18 | |
| NC | 22 | André Morel Louis Wagner Robert Benoist | Delage 15 S 8 | 41 | 7h35m22 | |
| NC | 19 | Ferdinando Minoia Louis Dutilleux | Bugatti T39A | 41 | 7h35m36 | |
| NC | 7 | Robert Benoist Robert Sénéchal Louis Wagner | Delage 15 S 8 | 33 | 7h26m31 | |
| Sources: | ||||||